US6142673A - Rolling bearing with current bridge - Google Patents

Rolling bearing with current bridge Download PDF

Info

Publication number
US6142673A
US6142673A US09/317,475 US31747599A US6142673A US 6142673 A US6142673 A US 6142673A US 31747599 A US31747599 A US 31747599A US 6142673 A US6142673 A US 6142673A
Authority
US
United States
Prior art keywords
ring
disk
rolling bearing
space
bearing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
US09/317,475
Other languages
English (en)
Inventor
Hubert Kottritsch
Ferdinand Schweitzer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SKF GmbH
Original Assignee
SKF GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by SKF GmbH filed Critical SKF GmbH
Assigned to SKF GMBH reassignment SKF GMBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: KOTTRITSCH, HUBERT, SCHWEITZER, FERDINAND
Application granted granted Critical
Publication of US6142673A publication Critical patent/US6142673A/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/66—Special parts or details in view of lubrication
    • F16C33/6603—Special parts or details in view of lubrication with grease as lubricant
    • F16C33/6607—Retaining the grease in or near the bearing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/66—Special parts or details in view of lubrication
    • F16C33/6603—Special parts or details in view of lubrication with grease as lubricant
    • F16C33/6633—Grease properties or compositions, e.g. rheological properties
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
    • F16C33/7816—Details of the sealing or parts thereof, e.g. geometry, material
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
    • F16C33/784—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to a groove in the inner surface of the outer race and extending toward the inner race
    • F16C33/7843—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to a groove in the inner surface of the outer race and extending toward the inner race with a single annular sealing disc
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C41/00—Other accessories, e.g. devices integrated in the bearing not relating to the bearing function as such
    • F16C41/002—Conductive elements, e.g. to prevent static electricity
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R39/00—Rotary current collectors, distributors or interrupters
    • H01R39/64—Devices for uninterrupted current collection
    • H01R39/643—Devices for uninterrupted current collection through ball or roller bearing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
    • F16C19/04—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly
    • F16C19/06—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly with a single row or balls
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2202/00—Solid materials defined by their properties
    • F16C2202/30—Electric properties; Magnetic properties
    • F16C2202/32—Conductivity
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2326/00—Articles relating to transporting
    • F16C2326/10—Railway vehicles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2380/00—Electrical apparatus
    • F16C2380/26—Dynamo-electric machines or combinations therewith, e.g. electro-motors and generators
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S277/00—Seal for a joint or juncture
    • Y10S277/919—Seal including electrical feature

Definitions

  • the present invention relates to a roller bearing have an inner ring, an outer ring, a plurality of rolling elements and a seal in the annular space between the inner and outer bearing rings serving as a current bridge to carry away electrical current which occurs between the bearing rings in some applications.
  • roller bearings In electrical machines such as traction motors in electrically powered vehicles, the roller bearings are exposed to the passage of current. When the amount of current passing through a roller bearing exceeds a certain density at the contact points between the rolling elements and the raceways, the surfaces of the raceways and thus the bearing itself are destroyed. Roller bearings which are exposed to the passage of current must therefore be protected from such current at least to the extent that the current density does not reach or exceed the danger limit in the roller bearing. It is known that current bridges can be provided outside the roller bearing for this purpose. In these applications, the contact resistance must be calculated so that the roller bearing is protected from the current.
  • EP 787,915 A1 describes a roller bearing with rolling elements which consist of electrically non-conductive material.
  • One of the bearing rings has a seal or the like attached to it. This seal touches both bearing rings and is designed to be electrically conductive, so that the electrical current is carried away from the roller bearing or so that electrical signals can be conducted through the roller bearing.
  • the rolling elements in this known solution are either made completely of non-conductive ceramic material or are covered with a coating of this material.
  • the seal consists of a suitable plastic.
  • This arrangement has certain disadvantages and drawbacks.
  • the problem in the prior art with the arrangement shown in Patent EP 787 915A1 is that the seal is a sliding seal which tends to wear at its lip portion. The erosion of the sliding element necessitates replacement from time to time. Furthermore, it has been observed that there is a build up at the seal lip which effects the current carrying capacity.
  • the task of the present invention is to create a rolling bearing of the type indicated above in which the roller bearing parts themselves do not have to be made out of or coated with a special material and in which the amount of current which can be transferred can be adapted easily to the specific application in question. Accordingly, it is an objective of the present invention, therefore, to provide a rolling bearing made of conventional materials with a seal that serves that dual function of directing the electrical currents along a predetermined path remote from the contact zone of the rolling elements and raceways and also provide a reserve for bearing lubricant.
  • the seal consists of an essentially flat disk, attached to one of the bearing rings, and a ring member attached to the other bearing ring, these two parts being in electrical contact with each other.
  • the annular conductor member which accepts the electrical current in such a way that it can carry the current directly away, so that it no longer needs to flow through the second bearing ring.
  • the annular conductor member can, for this purpose, be provided with appropriate conductors such as soldered-on grounding cables or the like, which are connected to a ground connection point.
  • the flow of current can be improved by providing the periphery of the free edge of the disk with brushes or the like, made of material with good electrical conductivity, these brushes being designed to rest against the annular conductor member.
  • a "U"-shaped space bounded on both sides is provided in accordance with another feature of the invention, into which space the free edge of the disk fits.
  • the annular conductor member is "L"-shaped; that is, it is an angle annular conductor member, the radial sidepiece of which cooperates with a shoulder on the bearing ring to form the space bounded on both sides, into which the free edge of the disk fits.
  • the annular conductor member itself is designed with a U-shape, and the free edge of the disk fits into the space between the radial sidepieces of this U-shaped annular conductor member.
  • the sealing effect is improved, and at the same time the free edge of the disk itself is more effectively protected from external influences. If the edge of the disk is provided with brushes, the brushes are more effectively protected.
  • FIG. 1 shows a cross section of the roller bearing according to the invention with a seal
  • FIGS. 2-5 show several exemplary embodiments of the seal in cross section
  • FIG. 6 is a side elevational view showing the bearing partly in section of a typical motor assembly incorporating a bearing in accordance with the present invention
  • FIG. 7A is a sectional view showing another feature of the present invention.
  • FIG. 7B is a view similar to FIG. 7A, showing still another feature of the present invention.
  • roller bearing 1 according to FIG. 1 consists of an inner ring 2, an outer ring 3, and several rolling bodies 4, in this case balls, which are distributed around the circumference and guided in a cage (not shown).
  • This roller bearing 1 is used in, for example, a traction motor for rail vehicles and is exposed to the flow of electric current, indicated by the lightning bolt.
  • roller bearing 1 is provided with a seal 5.
  • This seal comprises a disk 6, which is attached by a folded-over inner section 7 to an annular ring-shaped slot 8 in inner ring 2, and a U-shaped annular conductor member 9, which is attached by its bushing-like base 10 to shoulder surface 11 of outer ring 3. Free edge 12 of disk 6 fits into space 13 between the radially oriented side pieces 14, 15 of annular conductor member 9.
  • free edge 12 of disk 6 is provided with brushes 16 around the circumference, which are in contact with annular conductor member 9 and thus make it possible for the current to flow across.
  • the current therefore does not need to flow across the contact points between rolling elements 4 and raceways 17, 18 of inner ring 2 and outer ring 3.
  • space 13 between radially oriented sidepieces 14, 15 is filled with a lubricating grease 19 with good electrical conductivity.
  • This lubricating grease 19 represents the conductive connection between disk 6 and annular conductor member 9.
  • disk 6 is provided with brushes 16 and space 13 is filled with lubricating grease 19.
  • lubricating grease 19 is transferred both by the brushes and by the lubricating grease.
  • annular conductor member 9 is L-shaped; that is, it is an angle ring with a radially oriented sidepiece 20, which can thus be pushed against shoulder 21 formed in bearing ring 3 by an undercut, etc., so that space 13, into which free edge 12 of disk 6 fits, is formed between shoulder 21 and radial sidepiece 20.
  • This space 13 is again filled with a lubricating grease with good electrical conductivity.
  • Disk 6 or annular conductor member 9 can be provided with, or suitably connected to, devices (not shown) for carrying away the electrical current.
  • FIG. 6 A typical rolling bearing installation is shown in FIG. 6, wherein wheel 33 is driven by electrical motor 30 through shaft 31 and hub 32. Outer ring 3 of bearing 1 is attached to and rotates with wheel 33. Inner ring 2 of bearing 1 is stationary and attached to chassis 35 through shaft 34. Without a current bridge, currents that may be present in bearing 1, will tend to flow through the rolling elements in this case ball causing deterioration of the balls and eventual failure. With a current bridge, currents that may be present in bearing 1, will flow through the path of least resistance from outer ring 3 through seal 5, which acts as a current bridge.
  • FIG. 7A current I flows through outer ring 3 to seal 5 and then to ground through conductor G.
  • a signal conductor S may be attached to seal 5 as shown in FIG. 7B to transmit data for evaluation.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rolling Contact Bearings (AREA)
  • Sealing Of Bearings (AREA)
US09/317,475 1998-05-29 1999-05-24 Rolling bearing with current bridge Expired - Fee Related US6142673A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19824022 1998-05-29
DE19824022A DE19824022C2 (de) 1998-05-29 1998-05-29 Wälzlager mit Strombrücke

Publications (1)

Publication Number Publication Date
US6142673A true US6142673A (en) 2000-11-07

Family

ID=7869275

Family Applications (1)

Application Number Title Priority Date Filing Date
US09/317,475 Expired - Fee Related US6142673A (en) 1998-05-29 1999-05-24 Rolling bearing with current bridge

Country Status (7)

Country Link
US (1) US6142673A (fr)
EP (1) EP0962675B1 (fr)
JP (1) JPH11351265A (fr)
AT (1) ATE207580T1 (fr)
CA (1) CA2273141C (fr)
CZ (1) CZ293374B6 (fr)
DE (2) DE19824022C2 (fr)

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6530694B2 (en) * 2000-04-20 2003-03-11 Nsk Ltd. Rolling bearing unit
WO2004038241A1 (fr) * 2002-10-24 2004-05-06 Sew-Eurodrive Gmbh & Co. Kg Dispositif servant au moins a transferer et/ou transmettre un couple
US20040103897A1 (en) * 2002-09-16 2004-06-03 Hickle Randall S. Drug delivery system and method
US6984906B1 (en) 2000-07-13 2006-01-10 General Electric Company Bearing current reduction assembly
US20100074567A1 (en) * 2007-03-12 2010-03-25 Davide Giordana sensorized bearing unit
US20110255999A1 (en) * 2008-08-06 2011-10-20 Oerlikon Leybold Vacuum Gmbh Use of a rolling-element bearing for bearing rotating components in vacuum devices and vacuum device
US20110317953A1 (en) * 2010-06-24 2011-12-29 Schaeffler Technologies Gmbh & Co. Kg Bearing closure/shield for current passage in electric equipment
US9175728B2 (en) * 2013-05-09 2015-11-03 Schaeffler Technologies AG & Co. KG Rolling bearing with integrated electrical shunt
GB2525699A (en) * 2014-01-07 2015-11-04 Vivid Lamination Technologies Ltd Improvements in laminating machines
US9581203B2 (en) 2015-04-22 2017-02-28 Schaeffler Technologies AG & Co. KG Shunt bearing with insulating coating
US9670955B2 (en) 2013-09-17 2017-06-06 Schaeffler Technologies AG & Co. KG Anti-friction bearing
WO2017165628A1 (fr) * 2016-03-25 2017-09-28 Opw-Engineered Systems, Inc. Joint articulé avec raccord de graissage à conductivité électrique
US9790995B2 (en) 2015-10-19 2017-10-17 Schaeffler Technologies AG & Co. KG Bearing seal with integrated grounding brush
US10612599B2 (en) 2018-09-12 2020-04-07 Schaeffler Technologies As & Co. Kg Bearing seal with integrated grounding shunt
CN112555276A (zh) * 2019-09-25 2021-03-26 保时捷股份公司 具有传感器的滚动轴承以及驱动单元
US11111962B1 (en) * 2020-07-16 2021-09-07 Schaeffler Technologies AG & Co. KG Bearing with an integrated electrical shunt
DE102020212587A1 (de) 2020-10-06 2022-04-07 Zf Friedrichshafen Ag Getriebe und elektrischer Achsantrieb für ein Kraftfahrzeug
US11637477B2 (en) * 2019-01-02 2023-04-25 Joseph Gentile Rotating machine
US11641146B2 (en) 2017-06-08 2023-05-02 Ntn Corporation Wheel bearing system with generator

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1133826C (zh) * 1999-11-15 2004-01-07 三菱电机株式会社 滚动轴承
DE10110067A1 (de) * 2001-03-02 2002-09-05 Thyssenkrupp Ag Lager mit einer elektrisch leitfähigen Verbindung zwischen den Lagerringen
DE202005016974U1 (de) * 2005-10-25 2006-01-05 Dettke, Christa Presseur
DE102006025580A1 (de) * 2006-06-01 2007-12-06 Schaeffler Kg Wälzlager
JP4911354B2 (ja) * 2007-05-15 2012-04-04 株式会社ジェイテクト 通電軸受
DE102007051235A1 (de) * 2007-10-26 2009-04-30 Schaeffler Kg Käfig für ein Wälzlager
DE102007052104A1 (de) * 2007-10-31 2009-06-25 Schaeffler Kg Dichtelement für ein Lager, insbesondere für ein Wälzlager
DE102008000854B4 (de) 2008-03-27 2011-12-22 Zf Friedrichshafen Ag Kugelgelenk, Spurstange und Lenkvorrichtung
DE102008017667A1 (de) 2008-04-03 2009-10-15 Rothe Erde Gmbh Lager mit einem geerdeten, drehbaren Lagerring
DE102010004853B4 (de) 2010-01-16 2017-11-16 Schaeffler Technologies AG & Co. KG Elektrisch isoliertes Wälzlager
DE102013217980B4 (de) 2013-09-09 2015-04-02 Schaeffler Technologies Gmbh & Co. Kg Wälzlager
DE102015223509A1 (de) * 2015-11-27 2017-03-02 Schaeffler Technologies AG & Co. KG Schutzvorrichtung mit elektrischer Leitfähigkeit
DE102016205049A1 (de) * 2016-03-24 2017-09-28 Schunk Bahn- Und Industrietechnik Gmbh Ableitungseinrichtung und Verfahren zur Ableitung elektrostatischer Ladungen
DE102016216818A1 (de) 2016-09-06 2018-03-08 Schaeffler Technologies AG & Co. KG Wälzlager mit Potentialausgleich
EP3431574A1 (fr) 2017-07-21 2019-01-23 Carl Bechem Gmbh Composition lubrifiante
DE102019133883A1 (de) * 2019-12-11 2021-06-17 Schaeffler Technologies AG & Co. KG Lagereinheit mit Elektrodenraum, Ableitbaugruppe sowie elektrische Antriebsanordnung mit der Lagereinheit und/oder der Ableitbaugruppe
DE102020125531A1 (de) 2020-09-30 2021-12-30 Schaeffler Technologies AG & Co. KG Wellenerdungsring, Lagereinheit mit Funkenspitzen, Lagereinheit sowie elektrische Antriebsanordnung mit der Lagereinheit und/oder Wellenerdungsring
CN114508554A (zh) * 2020-11-16 2022-05-17 沃尔沃汽车公司 刹车系统

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3250580A (en) * 1962-10-16 1966-05-10 Hans Ziller Seal for grease-lubricated antifriction bearings
US3564477A (en) * 1969-08-11 1971-02-16 Gen Motors Corp Conductor seal
GB2159892A (en) * 1984-06-07 1985-12-11 Skf Gmbh A rolling bearing with first and second race rings and an annular seal
US4856916A (en) * 1987-09-19 1989-08-15 Ntn Toyo Bearing Co., Ltd. Conducting rolling bearing
US5139425A (en) * 1990-09-13 1992-08-18 Skf France Rolling bearing with rotating electrical contacts
JPH05126158A (ja) * 1991-10-31 1993-05-21 Sony Corp 回転軸受け装置
EP0787915A1 (fr) * 1996-02-05 1997-08-06 Aktiebolaget SKF Palier à contact de roulement

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4797013A (en) * 1987-02-09 1989-01-10 Ferrofluidics Corporation Compact ferrofluidic electrically conducting sealed bearing
US5812908A (en) * 1997-03-25 1998-09-22 Xerox Corporation Carbon fiber electrical contact mounting for rotating elements

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3250580A (en) * 1962-10-16 1966-05-10 Hans Ziller Seal for grease-lubricated antifriction bearings
US3564477A (en) * 1969-08-11 1971-02-16 Gen Motors Corp Conductor seal
GB2159892A (en) * 1984-06-07 1985-12-11 Skf Gmbh A rolling bearing with first and second race rings and an annular seal
US4856916A (en) * 1987-09-19 1989-08-15 Ntn Toyo Bearing Co., Ltd. Conducting rolling bearing
US5139425A (en) * 1990-09-13 1992-08-18 Skf France Rolling bearing with rotating electrical contacts
JPH05126158A (ja) * 1991-10-31 1993-05-21 Sony Corp 回転軸受け装置
EP0787915A1 (fr) * 1996-02-05 1997-08-06 Aktiebolaget SKF Palier à contact de roulement
US5863135A (en) * 1996-02-05 1999-01-26 Aktieboalget Skf Rolling bearing

Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6530694B2 (en) * 2000-04-20 2003-03-11 Nsk Ltd. Rolling bearing unit
US6984906B1 (en) 2000-07-13 2006-01-10 General Electric Company Bearing current reduction assembly
US20040103897A1 (en) * 2002-09-16 2004-06-03 Hickle Randall S. Drug delivery system and method
WO2004038241A1 (fr) * 2002-10-24 2004-05-06 Sew-Eurodrive Gmbh & Co. Kg Dispositif servant au moins a transferer et/ou transmettre un couple
US20100074567A1 (en) * 2007-03-12 2010-03-25 Davide Giordana sensorized bearing unit
US8313240B2 (en) * 2007-03-12 2012-11-20 Aktiebolaget Skf Sensorized bearing unit
US20110255999A1 (en) * 2008-08-06 2011-10-20 Oerlikon Leybold Vacuum Gmbh Use of a rolling-element bearing for bearing rotating components in vacuum devices and vacuum device
US20110317953A1 (en) * 2010-06-24 2011-12-29 Schaeffler Technologies Gmbh & Co. Kg Bearing closure/shield for current passage in electric equipment
US8632251B2 (en) * 2010-06-24 2014-01-21 Schaeffler Technologies AG & Co. KG Bearing closure/shield for current passage in electric equipment
US9464672B2 (en) 2013-05-09 2016-10-11 Schaeffler Technologies AG & Co. KG Rolling bearing with integrated electrical shunt
US9175728B2 (en) * 2013-05-09 2015-11-03 Schaeffler Technologies AG & Co. KG Rolling bearing with integrated electrical shunt
US9670955B2 (en) 2013-09-17 2017-06-06 Schaeffler Technologies AG & Co. KG Anti-friction bearing
GB2525699A (en) * 2014-01-07 2015-11-04 Vivid Lamination Technologies Ltd Improvements in laminating machines
GB2525699B (en) * 2014-01-07 2016-06-22 Vivid Lamination Tech Ltd Bearings for laminating machines
US9581203B2 (en) 2015-04-22 2017-02-28 Schaeffler Technologies AG & Co. KG Shunt bearing with insulating coating
US9790995B2 (en) 2015-10-19 2017-10-17 Schaeffler Technologies AG & Co. KG Bearing seal with integrated grounding brush
WO2017165628A1 (fr) * 2016-03-25 2017-09-28 Opw-Engineered Systems, Inc. Joint articulé avec raccord de graissage à conductivité électrique
US10436363B2 (en) 2016-03-25 2019-10-08 Opw-Engineered Systems, Inc. Swivel joint with electrical conductivity grease fitting
US11674623B2 (en) 2016-03-25 2023-06-13 Knappco, LLC Swivel joint with electrical conductivity grease fitting
US11641146B2 (en) 2017-06-08 2023-05-02 Ntn Corporation Wheel bearing system with generator
US10612599B2 (en) 2018-09-12 2020-04-07 Schaeffler Technologies As & Co. Kg Bearing seal with integrated grounding shunt
US11637477B2 (en) * 2019-01-02 2023-04-25 Joseph Gentile Rotating machine
CN112555276A (zh) * 2019-09-25 2021-03-26 保时捷股份公司 具有传感器的滚动轴承以及驱动单元
US11111962B1 (en) * 2020-07-16 2021-09-07 Schaeffler Technologies AG & Co. KG Bearing with an integrated electrical shunt
DE102020212587A1 (de) 2020-10-06 2022-04-07 Zf Friedrichshafen Ag Getriebe und elektrischer Achsantrieb für ein Kraftfahrzeug

Also Published As

Publication number Publication date
EP0962675A2 (fr) 1999-12-08
DE19824022C2 (de) 2003-10-30
EP0962675B1 (fr) 2001-10-24
ATE207580T1 (de) 2001-11-15
CA2273141C (fr) 2003-12-30
DE59900336D1 (de) 2001-11-29
CA2273141A1 (fr) 1999-11-29
DE19824022A1 (de) 1999-12-16
CZ190099A3 (cs) 2000-09-13
CZ293374B6 (cs) 2004-04-14
JPH11351265A (ja) 1999-12-24
EP0962675A3 (fr) 2000-09-06

Similar Documents

Publication Publication Date Title
US6142673A (en) Rolling bearing with current bridge
US10270320B1 (en) Motor grounding seal
US9581203B2 (en) Shunt bearing with insulating coating
US9464672B2 (en) Rolling bearing with integrated electrical shunt
EP1872463B1 (fr) Ensemble couronne porte-balais de regulation de courant d'arbre
US20070138748A1 (en) Motor ground seal
US20170108047A1 (en) Bearing seal with integrated grounding brush
CN102422368B (zh) 分流器环
US8992091B2 (en) Closure design of a conductive rubber material for allowing current passage through a bearing in electric machines
US6102574A (en) Rolling mounting for rail vehicles with current passage
CN111095690A (zh) 缓解旋转轴上的电压的方法和设备
JPS604617A (ja) 動圧流体軸受
US4502739A (en) Roller bearing seal
CN113939663A (zh) 密封装置
WO1989002543A1 (fr) Roulement a rouleaux electrique
US4820948A (en) Electric motor
US6250813B1 (en) Bearing assembly with housing cap and seal
JP2001153145A (ja) 密封形転がり軸受
DE102020134537A1 (de) Lager mit leitendem Medium
CN114056373A (zh) 端盖组件和轴箱装置
JPH0544570Y2 (fr)
CN214500040U (zh) 一种导电密封环及轴承组件
KR0126617Y1 (ko) 선재 전기도금장치의 회전축용 브러쉬
US4282508A (en) Electrical signal interconnection coupler
JPH0614547U (ja) 通電転がり軸受

Legal Events

Date Code Title Description
AS Assignment

Owner name: SKF GMBH, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:KOTTRITSCH, HUBERT;SCHWEITZER, FERDINAND;REEL/FRAME:010135/0173

Effective date: 19990607

FEPP Fee payment procedure

Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

FPAY Fee payment

Year of fee payment: 4

REMI Maintenance fee reminder mailed
FEPP Fee payment procedure

Free format text: PETITION RELATED TO MAINTENANCE FEES FILED (ORIGINAL EVENT CODE: PMFP); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

FEPP Fee payment procedure

Free format text: PETITION RELATED TO MAINTENANCE FEES GRANTED (ORIGINAL EVENT CODE: PMFG); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

REIN Reinstatement after maintenance fee payment confirmed
FP Lapsed due to failure to pay maintenance fee

Effective date: 20081107

FPAY Fee payment

Year of fee payment: 8

SULP Surcharge for late payment
PRDP Patent reinstated due to the acceptance of a late maintenance fee

Effective date: 20091119

REMI Maintenance fee reminder mailed
LAPS Lapse for failure to pay maintenance fees
STCH Information on status: patent discontinuation

Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362

FP Lapsed due to failure to pay maintenance fee

Effective date: 20121107